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| author | Finn Thain <fthain@telegraphics.com.au> | 2016-01-03 06:05:08 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-01-07 03:42:52 +0100 |
| commit | b6488f97d3b5b602a066956e58a1ba282456d79b (patch) | |
| tree | 1ca8032c303d20869e0955f962c3747fbb297322 /drivers/scsi/NCR5380.h | |
| parent | ncr5380: Remove NCR5380_instance_name macro (diff) | |
| download | linux-b6488f97d3b5b602a066956e58a1ba282456d79b.tar.xz linux-b6488f97d3b5b602a066956e58a1ba282456d79b.zip | |
ncr5380: Split NCR5380_init() into two functions
This patch splits the NCR5380_init() function into two parts, similar
to the scheme used with atari_NCR5380.c. This avoids two problems.
Firstly, NCR5380_init() may perform a bus reset, which would cause the
chip to assert IRQ. The chip is unable to mask its bus reset interrupt.
Drivers can't call request_irq() before calling NCR5380_init(), because
initialization must happen before the interrupt handler executes. If
driver initialization causes an interrupt it may be problematic on some
platforms. To avoid that, first move the bus reset code into
NCR5380_maybe_reset_bus().
Secondly, NCR5380_init() contains some board-specific interrupt setup code
for the NCR53C400 that does not belong in the core driver. In moving this
code, better not re-order interrupt initialization and bus reset. Again,
the solution is to move the bus reset code into NCR5380_maybe_reset_bus().
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/NCR5380.h')
| -rw-r--r-- | drivers/scsi/NCR5380.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/NCR5380.h b/drivers/scsi/NCR5380.h index 24c784140db6..2057eaa66c20 100644 --- a/drivers/scsi/NCR5380.h +++ b/drivers/scsi/NCR5380.h @@ -318,6 +318,7 @@ static void NCR5380_print(struct Scsi_Host *instance); static int NCR5380_probe_irq(struct Scsi_Host *instance, int possible); #endif static int NCR5380_init(struct Scsi_Host *instance, int flags); +static int NCR5380_maybe_reset_bus(struct Scsi_Host *); static void NCR5380_exit(struct Scsi_Host *instance); static void NCR5380_information_transfer(struct Scsi_Host *instance); #ifndef DONT_USE_INTR |