Commit 0b7a2235 authored Nov 16, 2019 by Finn Thain Committed by Martin K. Petersen Nov 19, 2019

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>

parent d04fc41a

drivers/scsi/NCR5380.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -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",