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authorFinn Thain <fthain@telegraphics.com.au>2019-11-16 06:36:57 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2019-11-20 05:37:34 +0300
commit0b7a223552d455bcfba6fb9cfc5eef2b5fce1491 (patch)
treece331aae01fced18b9918b3c4fffe74ec72f14ab /drivers/scsi/NCR5380.c
parentd04fc41af247a2ce993155bce7995d857464a096 (diff)
downloadlinux-0b7a223552d455bcfba6fb9cfc5eef2b5fce1491.tar.xz
scsi: NCR5380: Add disconnect_mask module parameter
Add a module parameter to inhibit disconnect/reselect for individual targets. This gains compatibility with Aztec PowerMonster SCSI/SATA adapters with buggy firmware. (No fix is available from the vendor.) Apparently these adapters pass-through the product/vendor of the attached SATA device. Since they can't be identified from the response to an INQUIRY command, a device blacklist flag won't work. Cc: Michael Schmitz <schmitzmic@gmail.com> Link: https://lore.kernel.org/r/993b17545990f31f9fa5a98202b51102a68e7594.1573875417.git.fthain@telegraphics.com.au Reviewed-and-tested-by: Michael Schmitz <schmitzmic@gmail.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/NCR5380.c')
-rw-r--r--drivers/scsi/NCR5380.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c
index 43745f26ef75..f2f7e6e76c07 100644
--- a/drivers/scsi/NCR5380.c
+++ b/drivers/scsi/NCR5380.c
@@ -129,6 +129,9 @@
#define NCR5380_release_dma_irq(x)
#endif
+static unsigned int disconnect_mask = ~0;
+module_param(disconnect_mask, int, 0444);
+
static int do_abort(struct Scsi_Host *);
static void do_reset(struct Scsi_Host *);
static void bus_reset_cleanup(struct Scsi_Host *);
@@ -967,7 +970,8 @@ static bool NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
int err;
bool ret = true;
bool can_disconnect = instance->irq != NO_IRQ &&
- cmd->cmnd[0] != REQUEST_SENSE;
+ cmd->cmnd[0] != REQUEST_SENSE &&
+ (disconnect_mask & BIT(scmd_id(cmd)));
NCR5380_dprint(NDEBUG_ARBITRATION, instance);
dsprintk(NDEBUG_ARBITRATION, instance, "starting arbitration, id = %d\n",