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scsi: NCR5380: Add disconnect_mask module parameter
[ Upstream commit 0b7a223552
]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 5 additions and 1 deletions
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@ -129,6 +129,9 @@
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#define NCR5380_release_dma_irq(x)
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#endif
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static unsigned int disconnect_mask = ~0;
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module_param(disconnect_mask, int, 0444);
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static int do_abort(struct Scsi_Host *);
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static void do_reset(struct Scsi_Host *);
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static void bus_reset_cleanup(struct Scsi_Host *);
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@ -946,7 +949,8 @@ static bool NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
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int err;
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bool ret = true;
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bool can_disconnect = instance->irq != NO_IRQ &&
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cmd->cmnd[0] != REQUEST_SENSE;
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cmd->cmnd[0] != REQUEST_SENSE &&
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(disconnect_mask & BIT(scmd_id(cmd)));
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NCR5380_dprint(NDEBUG_ARBITRATION, instance);
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dsprintk(NDEBUG_ARBITRATION, instance, "starting arbitration, id = %d\n",
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