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Groups > linux.kernel > #1535823
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 1/4] g_NCR5380: Check for chip presence before calling NCR5380_init() |
| Date | 2016-12-05 07:10 +0100 |
| Message-ID | <sKUDo-JO-21@gated-at.bofh.it> (permalink) |
| References | <sKUDn-JO-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Ondrej Zary <linux@rainbow-software.org>
Write and read back mode register to check that a chip is really there.
If no card is present, reads result in 0xff.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
---
drivers/scsi/g_NCR5380.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
index de5147a..76e3745 100644
--- a/drivers/scsi/g_NCR5380.c
+++ b/drivers/scsi/g_NCR5380.c
@@ -248,6 +248,13 @@ static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
}
}
+ /* Check for vacant slot */
+ NCR5380_write(MODE_REG, 0);
+ if (NCR5380_read(MODE_REG) != 0) {
+ ret = -ENODEV;
+ goto out_unregister;
+ }
+
ret = NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP);
if (ret)
goto out_unregister;
--
2.7.3
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[PATCH 0/4] g_NCR5380: Bug fix and some enhancements Finn Thain <fthain@telegraphics.com.au> - 2016-12-05 07:10 +0100
[PATCH 1/4] g_NCR5380: Check for chip presence before calling NCR5380_init() Finn Thain <fthain@telegraphics.com.au> - 2016-12-05 07:10 +0100
[PATCH 4/4] g_NCR5380: Autoprobe board IRQ by default Finn Thain <fthain@telegraphics.com.au> - 2016-12-05 07:10 +0100
[PATCH 2/4] g_NCR5380: Use probe_irq_*() for IRQ probing Finn Thain <fthain@telegraphics.com.au> - 2016-12-05 07:10 +0100
[PATCH 3/4] g_NCR5380: Fix automatic IRQ on HP C2502 cards Finn Thain <fthain@telegraphics.com.au> - 2016-12-05 07:10 +0100
Re: [PATCH 0/4] g_NCR5380: Bug fix and some enhancements Ondrej Zary <linux@rainbow-software.org> - 2016-12-08 19:50 +0100
Re: [PATCH 0/4] g_NCR5380: Bug fix and some enhancements Finn Thain <fthain@telegraphics.com.au> - 2016-12-08 23:30 +0100
Re: [PATCH 0/4] g_NCR5380: Bug fix and some enhancements "Martin K. Petersen" <martin.petersen@oracle.com> - 2016-12-08 23:00 +0100
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