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authorMike Miller <mike.miller@hp.com>2013-04-29 11:55:53 -0700
committerJens Axboe <axboe@kernel.dk>2013-04-29 21:24:02 +0200
commite4292e05d4c1bb4e64c299ea4b378a0f66d3cc8a (patch)
treea5e4a07ab1d6786828ce91fe9466b27e78ccd005 /drivers/block/cciss.c
parentaed3d67e57ec3d27d64114ab61dab9bcd69fe42f (diff)
cciss: add cciss_allow_hpsa module parameter
Add the cciss_allow_hpsa modules parameter. This allows users to use the hpsa driver instead of cciss for older controllers. Signed-off-by: Mike Miller <mike.miller@hp.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/cciss.c')
-rw-r--r--drivers/block/cciss.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index ade58bc8f3c..2b485ca1150 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -75,6 +75,12 @@ module_param(cciss_simple_mode, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(cciss_simple_mode,
"Use 'simple mode' rather than 'performant mode'");
+static int cciss_allow_hpsa;
+module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(cciss_allow_hpsa,
+ "Prevent cciss driver from accessing hardware known to be "
+ " supported by the hpsa driver");
+
static DEFINE_MUTEX(cciss_mutex);
static struct proc_dir_entry *proc_cciss;
@@ -4116,9 +4122,13 @@ static int cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
*board_id = ((subsystem_device_id << 16) & 0xffff0000) |
subsystem_vendor_id;
- for (i = 0; i < ARRAY_SIZE(products); i++)
+ for (i = 0; i < ARRAY_SIZE(products); i++) {
+ /* Stand aside for hpsa driver on request */
+ if (cciss_allow_hpsa)
+ return -ENODEV;
if (*board_id == products[i].board_id)
return i;
+ }
dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x, ignoring.\n",
*board_id);
return -ENODEV;