From de75914ee103a30d82ad21b39b7e04f70e4fa1f0 Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Wed, 28 Sep 2005 19:41:56 +0200 Subject: [PATCH] pcmcia: validate_mem shouldn't be void Add a return value to pcmcia_validate_mem. Only if we have enough memory available to map the CIS, we should proceed in trying to determine information about the device. Signed-off-by: Dominik Brodowski --- drivers/pcmcia/rsrc_nonstatic.c | 123 +++++++++++++++++++++------------------- 1 file changed, 66 insertions(+), 57 deletions(-) (limited to 'drivers/pcmcia/rsrc_nonstatic.c') diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c index 00960a379b9..ebfcab5df9e 100644 --- a/drivers/pcmcia/rsrc_nonstatic.c +++ b/drivers/pcmcia/rsrc_nonstatic.c @@ -407,56 +407,62 @@ static int do_mem_probe(u_long base, u_long num, struct pcmcia_socket *s) static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s) { - struct socket_data *s_data = s->resource_data; - u_long ok; - if (m == &s_data->mem_db) - return 0; - ok = inv_probe(m->next, s); - if (ok) { - if (m->base >= 0x100000) - sub_interval(&s_data->mem_db, m->base, m->num); - return ok; - } - if (m->base < 0x100000) - return 0; - return do_mem_probe(m->base, m->num, s); + struct socket_data *s_data = s->resource_data; + u_long ok; + if (m == &s_data->mem_db) + return 0; + ok = inv_probe(m->next, s); + if (ok) { + if (m->base >= 0x100000) + sub_interval(&s_data->mem_db, m->base, m->num); + return ok; + } + if (m->base < 0x100000) + return 0; + return do_mem_probe(m->base, m->num, s); } -static void validate_mem(struct pcmcia_socket *s, unsigned int probe_mask) +static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask) { - struct resource_map *m, mm; - static u_char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 }; - u_long b, i, ok = 0; - struct socket_data *s_data = s->resource_data; + struct resource_map *m, mm; + static unsigned char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 }; + unsigned long b, i, ok = 0; + struct socket_data *s_data = s->resource_data; - /* We do up to four passes through the list */ - if (probe_mask & MEM_PROBE_HIGH) { - if (inv_probe(s_data->mem_db.next, s) > 0) - return; - printk(KERN_NOTICE "cs: warning: no high memory space " - "available!\n"); - } - if ((probe_mask & MEM_PROBE_LOW) == 0) - return; - for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) { - mm = *m; - /* Only probe < 1 MB */ - if (mm.base >= 0x100000) continue; - if ((mm.base | mm.num) & 0xffff) { - ok += do_mem_probe(mm.base, mm.num, s); - continue; + /* We do up to four passes through the list */ + if (probe_mask & MEM_PROBE_HIGH) { + if (inv_probe(s_data->mem_db.next, s) > 0) + return 0; + printk(KERN_NOTICE "cs: warning: no high memory space " + "available!\n"); + return -ENODEV; } - /* Special probe for 64K-aligned block */ - for (i = 0; i < 4; i++) { - b = order[i] << 12; - if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) { - if (ok >= mem_limit) - sub_interval(&s_data->mem_db, b, 0x10000); - else - ok += do_mem_probe(b, 0x10000, s); - } + + for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) { + mm = *m; + /* Only probe < 1 MB */ + if (mm.base >= 0x100000) + continue; + if ((mm.base | mm.num) & 0xffff) { + ok += do_mem_probe(mm.base, mm.num, s); + continue; + } + /* Special probe for 64K-aligned block */ + for (i = 0; i < 4; i++) { + b = order[i] << 12; + if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) { + if (ok >= mem_limit) + sub_interval(&s_data->mem_db, b, 0x10000); + else + ok += do_mem_probe(b, 0x10000, s); + } + } } - } + + if (ok > 0) + return 0; + + return -ENODEV; } #else /* CONFIG_PCMCIA_PROBE */ @@ -478,27 +484,30 @@ static void validate_mem(struct pcmcia_socket *s, unsigned int probe_mask) /* * Locking note: Must be called with skt_sem held! */ -static void pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s) +static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s) { struct socket_data *s_data = s->resource_data; - if (probe_mem) { - unsigned int probe_mask; + unsigned int probe_mask = MEM_PROBE_LOW; + int ret = 0; - down(&rsrc_sem); + if (!probe_mem) + return 0; - probe_mask = MEM_PROBE_LOW; - if (s->features & SS_CAP_PAGE_REGS) - probe_mask = MEM_PROBE_HIGH; + down(&rsrc_sem); - if (probe_mask & ~s_data->rsrc_mem_probe) { + if (s->features & SS_CAP_PAGE_REGS) + probe_mask = MEM_PROBE_HIGH; + + if (probe_mask & ~s_data->rsrc_mem_probe) { + if (s->state & SOCKET_PRESENT) + ret = validate_mem(s, probe_mask); + if (!ret) s_data->rsrc_mem_probe |= probe_mask; + } - if (s->state & SOCKET_PRESENT) - validate_mem(s, probe_mask); - } + up(&rsrc_sem); - up(&rsrc_sem); - } + return ret; } struct pcmcia_align_data { -- cgit v1.2.3-70-g09d2