diff options
author | Jean-Francois Moine <moinejf@free.fr> | 2008-07-14 09:38:29 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-07-20 07:26:14 -0300 |
commit | 739570bb218bb4607df1f197282561e97a98e54a (patch) | |
tree | 25555dfe5ac873bc96866c486d6f6c1dcabf24f4 /drivers/media/video/gspca/zc3xx.c | |
parent | 5b77ae7776183d733ec86727bcc34c52a336afd6 (diff) |
V4L/DVB (8352): gspca: Buffers for USB exchanges cannot be in the stack.
gspca: Protect dq_callback() against simultaneous USB exchanges.
Temporary buffer for USB exchanges added in the device struct.
(all) Use a temporary buffer for all USB exchanges.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/gspca/zc3xx.c')
-rw-r--r-- | drivers/media/video/gspca/zc3xx.c | 199 |
1 files changed, 100 insertions, 99 deletions
diff --git a/drivers/media/video/gspca/zc3xx.c b/drivers/media/video/gspca/zc3xx.c index bac45a19365..548c4c8c3f3 100644 --- a/drivers/media/video/gspca/zc3xx.c +++ b/drivers/media/video/gspca/zc3xx.c @@ -24,8 +24,8 @@ #include "gspca.h" -#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 1, 5) -static const char version[] = "2.1.5"; +#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 1, 7) +static const char version[] = "2.1.7"; MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>, " "Serge A. Suchkov <Serge.A.S@tochka.ru>"); @@ -6214,23 +6214,27 @@ static const struct usb_action tas5130c_vf0250_NoFlikerScale[] = { {} }; -static void reg_r_i(struct usb_device *dev, - __u16 index, __u8 *buffer) +static int reg_r_i(struct gspca_dev *gspca_dev, + __u16 index) { - usb_control_msg(dev, - usb_rcvctrlpipe(dev, 0), + usb_control_msg(gspca_dev->dev, + usb_rcvctrlpipe(gspca_dev->dev, 0), 0xa1, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0x01, /* value */ - index, buffer, 1, + index, gspca_dev->usb_buf, 1, 500); + return gspca_dev->usb_buf[0]; } -static void reg_r(struct usb_device *dev, - __u16 index, __u8 *buffer) +static int reg_r(struct gspca_dev *gspca_dev, + __u16 index) { - reg_r_i(dev, index, buffer); - PDEBUG(D_USBI, "reg r [%04x] -> %02x", index, *buffer); + int ret; + + ret = reg_r_i(gspca_dev, index); + PDEBUG(D_USBI, "reg r [%04x] -> %02x", index, ret); + return ret; } static void reg_w_i(struct usb_device *dev, @@ -6253,55 +6257,54 @@ static void reg_w(struct usb_device *dev, reg_w_i(dev, value, index); } -static __u16 i2c_read(struct usb_device *dev, __u8 reg) +static __u16 i2c_read(struct gspca_dev *gspca_dev, + __u8 reg) { __u8 retbyte; __u8 retval[2]; - reg_w_i(dev, reg, 0x92); - reg_w_i(dev, 0x02, 0x90); /* <- read command */ + reg_w_i(gspca_dev->dev, reg, 0x92); + reg_w_i(gspca_dev->dev, 0x02, 0x90); /* <- read command */ msleep(25); - reg_r_i(dev, 0x0091, &retbyte); /* read status */ - reg_r_i(dev, 0x0095, &retval[0]); /* read Lowbyte */ - reg_r_i(dev, 0x0096, &retval[1]); /* read Hightbyte */ + retbyte = reg_r_i(gspca_dev, 0x0091); /* read status */ + retval[0] = reg_r_i(gspca_dev, 0x0095); /* read Lowbyte */ + retval[1] = reg_r_i(gspca_dev, 0x0096); /* read Hightbyte */ PDEBUG(D_USBO, "i2c r [%02x] -> (%02x) %02x%02x", reg, retbyte, retval[1], retval[0]); return (retval[1] << 8) | retval[0]; } -static __u8 i2c_write(struct usb_device *dev, +static __u8 i2c_write(struct gspca_dev *gspca_dev, __u8 reg, __u8 valL, __u8 valH) { __u8 retbyte; - reg_w_i(dev, reg, 0x92); - reg_w_i(dev, valL, 0x93); - reg_w_i(dev, valH, 0x94); - reg_w_i(dev, 0x01, 0x90); /* <- write command */ + reg_w_i(gspca_dev->dev, reg, 0x92); + reg_w_i(gspca_dev->dev, valL, 0x93); + reg_w_i(gspca_dev->dev, valH, 0x94); + reg_w_i(gspca_dev->dev, 0x01, 0x90); /* <- write command */ msleep(5); - reg_r_i(dev, 0x0091, &retbyte); /* read status */ + retbyte = reg_r_i(gspca_dev, 0x0091); /* read status */ PDEBUG(D_USBO, "i2c w [%02x] %02x%02x (%02x)", reg, valH, valL, retbyte); return retbyte; } -static void usb_exchange(struct usb_device *dev, +static void usb_exchange(struct gspca_dev *gspca_dev, const struct usb_action *action) { - __u8 buffread; - while (action->req) { switch (action->req) { case 0xa0: /* write register */ - reg_w(dev, action->val, action->idx); + reg_w(gspca_dev->dev, action->val, action->idx); break; case 0xa1: /* read status */ - reg_r(dev, action->idx, &buffread); + reg_r(gspca_dev, action->idx); break; case 0xaa: - i2c_write(dev, + i2c_write(gspca_dev, action->val, /* reg */ action->idx & 0xff, /* valL */ action->idx >> 8); /* valH */ @@ -6376,7 +6379,6 @@ static void setsharpness(struct gspca_dev *gspca_dev) struct sd *sd = (struct sd *) gspca_dev; struct usb_device *dev = gspca_dev->dev; int sharpness; - __u8 retbyte; static const __u8 sharpness_tb[][2] = { {0x02, 0x03}, {0x04, 0x07}, @@ -6386,9 +6388,9 @@ static void setsharpness(struct gspca_dev *gspca_dev) sharpness = sd->sharpness; reg_w(dev, sharpness_tb[sharpness][0], 0x01c6); - reg_r(dev, 0x01c8, &retbyte); - reg_r(dev, 0x01c9, &retbyte); - reg_r(dev, 0x01ca, &retbyte); + reg_r(gspca_dev, 0x01c8); + reg_r(gspca_dev, 0x01c9); + reg_r(gspca_dev, 0x01ca); reg_w(dev, sharpness_tb[sharpness][1], 0x01cb); } @@ -6398,7 +6400,7 @@ static void setcontrast(struct gspca_dev *gspca_dev) struct usb_device *dev = gspca_dev->dev; const __u8 *Tgamma, *Tgradient; int g, i, k; - static const __u8 kgamma_tb[16] = /* delta for contrast */ + static const __u8 kgamma_tb[16] = /* delta for contrast */ {0x15, 0x0d, 0x0a, 0x09, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08}; static const __u8 kgrad_tb[16] = @@ -6623,7 +6625,7 @@ static int setlightfreq(struct gspca_dev *gspca_dev) i++; /* 640x480 */ zc3_freq = freq_tb[(int) sd->sensor][i]; if (zc3_freq != NULL) { - usb_exchange(gspca_dev->dev, zc3_freq); + usb_exchange(gspca_dev, zc3_freq); switch (sd->sensor) { case SENSOR_GC0305: if (mode /* if 320x240 */ @@ -6687,44 +6689,45 @@ static void start_2wr_probe(struct usb_device *dev, int sensor) /* msleep(2); */ } -static int sif_probe(struct usb_device *dev) +static int sif_probe(struct gspca_dev *gspca_dev) { __u16 checkword; - start_2wr_probe(dev, 0x0f); /* PAS106 */ - reg_w(dev, 0x08, 0x008d); + start_2wr_probe(gspca_dev->dev, 0x0f); /* PAS106 */ + reg_w(gspca_dev->dev, 0x08, 0x008d); msleep(150); - checkword = ((i2c_read(dev, 0x00) & 0x0f) << 4) - | ((i2c_read(dev, 0x01) & 0xf0) >> 4); + checkword = ((i2c_read(gspca_dev, 0x00) & 0x0f) << 4) + | ((i2c_read(gspca_dev, 0x01) & 0xf0) >> 4); PDEBUG(D_PROBE, "probe sif 0x%04x", checkword); if (checkword == 0x0007) { - send_unknown(dev, SENSOR_PAS106); + send_unknown(gspca_dev->dev, SENSOR_PAS106); return 0x0f; /* PAS106 */ } return -1; } -static int vga_2wr_probe(struct usb_device *dev) +static int vga_2wr_probe(struct gspca_dev *gspca_dev) { + struct usb_device *dev = gspca_dev->dev; __u8 retbyte; __u16 checkword; start_2wr_probe(dev, 0x00); /* HV7131B */ - i2c_write(dev, 0x01, 0xaa, 0x00); - retbyte = i2c_read(dev, 0x01); + i2c_write(gspca_dev, 0x01, 0xaa, 0x00); + retbyte = i2c_read(gspca_dev, 0x01); if (retbyte != 0) return 0x00; /* HV7131B */ start_2wr_probe(dev, 0x04); /* CS2102 */ - i2c_write(dev, 0x01, 0xaa, 0x00); - retbyte = i2c_read(dev, 0x01); + i2c_write(gspca_dev, 0x01, 0xaa, 0x00); + retbyte = i2c_read(gspca_dev, 0x01); if (retbyte != 0) return 0x04; /* CS2102 */ start_2wr_probe(dev, 0x06); /* OmniVision */ reg_w(dev, 0x08, 0x8d); - i2c_write(dev, 0x11, 0xaa, 0x00); - retbyte = i2c_read(dev, 0x11); + i2c_write(gspca_dev, 0x11, 0xaa, 0x00); + retbyte = i2c_read(gspca_dev, 0x11); if (retbyte != 0) { /* (should have returned 0xaa) --> Omnivision? */ /* reg_r 0x10 -> 0x06 --> */ @@ -6732,45 +6735,45 @@ static int vga_2wr_probe(struct usb_device *dev) } start_2wr_probe(dev, 0x08); /* HDCS2020 */ - i2c_write(dev, 0x15, 0xaa, 0x00); - retbyte = i2c_read(dev, 0x15); + i2c_write(gspca_dev, 0x15, 0xaa, 0x00); + retbyte = i2c_read(gspca_dev, 0x15); if (retbyte != 0) return 0x08; /* HDCS2020 */ start_2wr_probe(dev, 0x0a); /* PB0330 */ - i2c_write(dev, 0x07, 0xaa, 0xaa); - retbyte = i2c_read(dev, 0x07); + i2c_write(gspca_dev, 0x07, 0xaa, 0xaa); + retbyte = i2c_read(gspca_dev, 0x07); if (retbyte != 0) return 0x0a; /* PB0330 */ - retbyte = i2c_read(dev, 0x03); + retbyte = i2c_read(gspca_dev, 0x03); if (retbyte != 0) return 0x0a; /* PB0330 ?? */ - retbyte = i2c_read(dev, 0x04); + retbyte = i2c_read(gspca_dev, 0x04); if (retbyte != 0) return 0x0a; /* PB0330 ?? */ start_2wr_probe(dev, 0x0c); /* ICM105A */ - i2c_write(dev, 0x01, 0x11, 0x00); - retbyte = i2c_read(dev, 0x01); + i2c_write(gspca_dev, 0x01, 0x11, 0x00); + retbyte = i2c_read(gspca_dev, 0x01); if (retbyte != 0) return 0x0c; /* ICM105A */ start_2wr_probe(dev, 0x0e); /* PAS202BCB */ reg_w(dev, 0x08, 0x8d); - i2c_write(dev, 0x03, 0xaa, 0x00); + i2c_write(gspca_dev, 0x03, 0xaa, 0x00); msleep(500); - retbyte = i2c_read(dev, 0x03); + retbyte = i2c_read(gspca_dev, 0x03); if (retbyte != 0) return 0x0e; /* PAS202BCB */ start_2wr_probe(dev, 0x02); /* ?? */ - i2c_write(dev, 0x01, 0xaa, 0x00); - retbyte = i2c_read(dev, 0x01); + i2c_write(gspca_dev, 0x01, 0xaa, 0x00); + retbyte = i2c_read(gspca_dev, 0x01); if (retbyte != 0) return 0x02; /* ?? */ ov_check: - reg_r(dev, 0x0010, &retbyte); /* ?? */ - reg_r(dev, 0x0010, &retbyte); + reg_r(gspca_dev, 0x0010); /* ?? */ + reg_r(gspca_dev, 0x0010); reg_w(dev, 0x01, 0x0000); reg_w(dev, 0x01, 0x0001); @@ -6779,10 +6782,10 @@ ov_check: reg_w(dev, 0x08, 0x008d); msleep(500); reg_w(dev, 0x01, 0x0012); - i2c_write(dev, 0x12, 0x80, 0x00); /* sensor reset */ - retbyte = i2c_read(dev, 0x0a); + i2c_write(gspca_dev, 0x12, 0x80, 0x00); /* sensor reset */ + retbyte = i2c_read(gspca_dev, 0x0a); checkword = retbyte << 8; - retbyte = i2c_read(dev, 0x0b); + retbyte = i2c_read(gspca_dev, 0x0b); checkword |= retbyte; PDEBUG(D_PROBE, "probe 2wr ov vga 0x%04x", checkword); switch (checkword) { @@ -6821,7 +6824,7 @@ static int vga_3wr_probe(struct gspca_dev *gspca_dev) /*fixme: lack of 8b=b3 (11,12)-> 10, 8b=e0 (14,15,16)-> 12 found in gspcav1*/ reg_w(dev, 0x02, 0x0010); - reg_r(dev, 0x10, &retbyte); + reg_r(gspca_dev, 0x10); reg_w(dev, 0x01, 0x0000); reg_w(dev, 0x00, 0x0010); reg_w(dev, 0x01, 0x0001); @@ -6829,23 +6832,23 @@ static int vga_3wr_probe(struct gspca_dev *gspca_dev) reg_w(dev, 0x03, 0x0012); reg_w(dev, 0x01, 0x0012); reg_w(dev, 0x05, 0x0012); - retbyte = i2c_read(dev, 0x14); + retbyte = i2c_read(gspca_dev, 0x14); if (retbyte != 0) return 0x11; /* HV7131R */ - retbyte = i2c_read(dev, 0x15); + retbyte = i2c_read(gspca_dev, 0x15); if (retbyte != 0) return 0x11; /* HV7131R */ - retbyte = i2c_read(dev, 0x16); + retbyte = i2c_read(gspca_dev, 0x16); if (retbyte != 0) return 0x11; /* HV7131R */ reg_w(dev, 0x02, 0x0010); - reg_r(dev, 0x000b, &retbyte); + retbyte = reg_r(gspca_dev, 0x000b); checkword = retbyte << 8; - reg_r(dev, 0x000a, &retbyte); + retbyte = reg_r(gspca_dev, 0x000a); checkword |= retbyte; PDEBUG(D_PROBE, "probe 3wr vga 1 0x%04x", checkword); - reg_r(dev, 0x0010, &retbyte); + reg_r(gspca_dev, 0x0010); /* this is tested only once anyway */ i = 0; while (chipset_revision_sensor[i].revision) { @@ -6863,7 +6866,7 @@ static int vga_3wr_probe(struct gspca_dev *gspca_dev) reg_w(dev, 0x0a, 0x0010); reg_w(dev, 0x03, 0x0012); reg_w(dev, 0x01, 0x0012); - retbyte = i2c_read(dev, 0x00); + retbyte = i2c_read(gspca_dev, 0x00); if (retbyte != 0) { PDEBUG(D_PROBE, "probe 3wr vga type 0a ?"); return 0x0a; /* ?? */ @@ -6876,7 +6879,7 @@ static int vga_3wr_probe(struct gspca_dev *gspca_dev) reg_w(dev, 0x03, 0x0012); msleep(2); reg_w(dev, 0x01, 0x0012); - retbyte = i2c_read(dev, 0x00); + retbyte = i2c_read(gspca_dev, 0x00); if (retbyte != 0) { PDEBUG(D_PROBE, "probe 3wr vga type %02x", retbyte); send_unknown(dev, SENSOR_GC0305); @@ -6890,8 +6893,8 @@ static int vga_3wr_probe(struct gspca_dev *gspca_dev) reg_w(dev, 0x06, 0x0010); reg_w(dev, 0x01, 0x0012); reg_w(dev, 0x05, 0x0012); - if (i2c_read(dev, 0x1c) == 0x7f /* OV7610 - manufacturer ID */ - && i2c_read(dev, 0x1d) == 0xa2) { + if (i2c_read(gspca_dev, 0x1c) == 0x7f /* OV7610 - manufacturer ID */ + && i2c_read(gspca_dev, 0x1d) == 0xa2) { send_unknown(dev, SENSOR_OV7620); return 0x06; /* OmniVision confirm ? */ } @@ -6905,13 +6908,13 @@ static int vga_3wr_probe(struct gspca_dev *gspca_dev) /* msleep(150); */ reg_w(dev, 0x01, 0x12); reg_w(dev, 0x05, 0x12); - retbyte = i2c_read(dev, 0x00); /* ID 0 */ + retbyte = i2c_read(gspca_dev, 0x00); /* ID 0 */ checkword = retbyte << 8; - retbyte = i2c_read(dev, 0x01); /* ID 1 */ + retbyte = i2c_read(gspca_dev, 0x01); /* ID 1 */ checkword |= retbyte; PDEBUG(D_PROBE, "probe 3wr vga 2 0x%04x", checkword); if (checkword == 0x2030) { - retbyte = i2c_read(dev, 0x02); /* revision number */ + retbyte = i2c_read(gspca_dev, 0x02); /* revision number */ PDEBUG(D_PROBE, "sensor PO2030 rev 0x%02x", retbyte); send_unknown(dev, SENSOR_PO2030); return checkword; @@ -6925,7 +6928,7 @@ static int vga_3wr_probe(struct gspca_dev *gspca_dev) reg_w(dev, 0x01, 0x12); reg_w(dev, 0x05, 0x01); reg_w(dev, 0xd3, 0x8b); - retbyte = i2c_read(dev, 0x01); + retbyte = i2c_read(gspca_dev, 0x01); if (retbyte != 0) { PDEBUG(D_PROBE, "probe 3wr vga type 0a ?"); return 0x0a; /* ?? */ @@ -6936,7 +6939,6 @@ static int vga_3wr_probe(struct gspca_dev *gspca_dev) static int zcxx_probeSensor(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; - struct usb_device *dev = gspca_dev->dev; int sensor, sensor2; switch (sd->sensor) { @@ -6944,7 +6946,7 @@ static int zcxx_probeSensor(struct gspca_dev *gspca_dev) case SENSOR_TAS5130C_VF0250: return -1; /* don't probe */ } - sensor = vga_2wr_probe(dev); + sensor = vga_2wr_probe(gspca_dev); if (sensor >= 0) { if (sensor < 0x7600) return sensor; @@ -6956,7 +6958,7 @@ static int zcxx_probeSensor(struct gspca_dev *gspca_dev) return sensor; return sensor2; } - return sif_probe(dev); + return sif_probe(gspca_dev); } /* this function is called at probe time */ @@ -6966,7 +6968,6 @@ static int sd_config(struct gspca_dev *gspca_dev, struct sd *sd = (struct sd *) gspca_dev; struct cam *cam; int sensor; - __u8 bsensor; int vga = 1; /* 1: vga, 0: sif */ static const __u8 gamma[SENSOR_MAX] = { 5, /* SENSOR_CS2102 0 */ @@ -7122,7 +7123,7 @@ static int sd_config(struct gspca_dev *gspca_dev, reg_w(gspca_dev->dev, 0x02, 0x0010); else reg_w(gspca_dev->dev, sensor & 0x0f, 0x0010); - reg_r(gspca_dev->dev, 0x0010, &bsensor); + reg_r(gspca_dev, 0x0010); } cam = &gspca_dev->cam; @@ -7163,7 +7164,6 @@ static void sd_start(struct gspca_dev *gspca_dev) struct usb_device *dev = gspca_dev->dev; const struct usb_action *zc3_init; int mode; - __u8 retbyte; static const struct usb_action *init_tb[SENSOR_MAX][2] = { {cs2102_InitialScale, cs2102_Initial}, /* 0 */ {cs2102K_InitialScale, cs2102K_Initial}, /* 1 */ @@ -7194,7 +7194,7 @@ static void sd_start(struct gspca_dev *gspca_dev) zcxx_probeSensor(gspca_dev); break; case SENSOR_PAS106: - usb_exchange(dev, pas106b_Initial_com); + usb_exchange(gspca_dev, pas106b_Initial_com); break; case SENSOR_PB0330: if (mode) { @@ -7210,14 +7210,14 @@ static void sd_start(struct gspca_dev *gspca_dev) } break; } - usb_exchange(dev, zc3_init); + usb_exchange(gspca_dev, zc3_init); switch (sd->sensor) { case SENSOR_GC0305: case SENSOR_OV7620: case SENSOR_PO2030: msleep(100); /* ?? */ - reg_r(dev, 0x0002, &retbyte); /* --> 0x40 */ + reg_r(gspca_dev, 0x0002); /* --> 0x40 */ reg_w(dev, 0x09, 0x01ad); /* (from win traces) */ reg_w(dev, 0x15, 0x01ae); reg_w(dev, 0x0d, 0x003a); @@ -7230,11 +7230,11 @@ static void sd_start(struct gspca_dev *gspca_dev) setbrightness(gspca_dev); switch (sd->sensor) { case SENSOR_OV7620: - reg_r(dev, 0x0008, &retbyte); + reg_r(gspca_dev, 0x0008); reg_w(dev, 0x00, 0x0008); break; case SENSOR_GC0305: - reg_r(dev, 0x0008, &retbyte); + reg_r(gspca_dev, 0x0008); /* fall thru */ case SENSOR_PO2030: reg_w(dev, 0x03, 0x0008); @@ -7259,7 +7259,7 @@ static void sd_start(struct gspca_dev *gspca_dev) setmatrix(gspca_dev); /* one more time? */ switch (sd->sensor) { case SENSOR_OV7620: - reg_r(dev, 0x0180, &retbyte); /* from win */ + reg_r(gspca_dev, 0x0180); /* from win */ reg_w(dev, 0x00, 0x0180); break; default: @@ -7277,7 +7277,7 @@ static void sd_start(struct gspca_dev *gspca_dev) break; case SENSOR_PO2030: reg_w(dev, 0x40, 0x0117); /* (from win traces) */ - reg_r(dev, 0x0180, &retbyte); + reg_r(gspca_dev, 0x0180); break; } @@ -7289,22 +7289,23 @@ static void sd_start(struct gspca_dev *gspca_dev) reg_w(dev, 0x15, 0x01ae); reg_w(dev, 0x40, 0x0180); reg_w(dev, 0x40, 0x0117); - reg_r(dev, 0x0180, &retbyte); + reg_r(gspca_dev, 0x0180); sd->autogain = 1; setautogain(gspca_dev); break; case SENSOR_OV7620: - i2c_read(dev, 0x13); /*fixme: returns 0xa3 */ - i2c_write(dev, 0x13, 0xa3, 0x00); /*fixme: same to send? */ + i2c_read(gspca_dev, 0x13); /*fixme: returns 0xa3 */ + i2c_write(gspca_dev, 0x13, 0xa3, 0x00); + /*fixme: returned value to send? */ reg_w(dev, 0x40, 0x0117); /* (from win traces) */ - reg_r(dev, 0x0180, &retbyte); + reg_r(gspca_dev, 0x0180); setautogain(gspca_dev); msleep(500); break; case SENSOR_PO2030: msleep(500); - reg_r(dev, 0x0008, &retbyte); - reg_r(dev, 0x0007, &retbyte); + reg_r(gspca_dev, 0x0008); + reg_r(gspca_dev, 0x0007); reg_w(dev, 0x00, 0x0007); /* (from win traces) */ reg_w(dev, 0x02, 0x0008); break; |