| Message ID | 4C052751.3070403@kernel.org |
|---|---|
| State | Not Applicable |
| Delegated to: | David Miller |
| Headers | show |
On 06/01/2010 11:29 AM, Tejun Heo wrote: > On mcp55, nIEN gets stuck once set and liteon blueray rom iHOS104-08 > violates ATA specification and fails to set I on D2H Reg FIS if nIEN > is set when the command was issued. When the other party is following > the spec, both devices can work fine but when the two flaws are put > together, they can't talk to each other. > > mcp55 has its own IRQ masking mechanism and there's no reason to mess > with nIEN in the first place. Fix it by dropping nIEN diddling from > nv_mcp55_freeze/thaw(). > > This was originally reported by Cengiz. Although Cengiz hasn't > verified the fix yet, I could reproduce this problem and verfiy the > fix. Even if Cengiz is experiencing different or additional problems, > this patch is needed. > > Signed-off-by: Tejun Heo<tj@kernel.org> > Reported-by: Cengiz Günay<cgunay@emory.edu> > Cc: stable@kernel.org > --- > drivers/ata/sata_nv.c | 2 -- applied -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c index 2a98b09..75482c9 100644 --- a/drivers/ata/sata_nv.c +++ b/drivers/ata/sata_nv.c @@ -1674,7 +1674,6 @@ static void nv_mcp55_freeze(struct ata_port *ap) mask = readl(mmio_base + NV_INT_ENABLE_MCP55); mask &= ~(NV_INT_ALL_MCP55 << shift); writel(mask, mmio_base + NV_INT_ENABLE_MCP55); - ata_sff_freeze(ap); } static void nv_mcp55_thaw(struct ata_port *ap) @@ -1688,7 +1687,6 @@ static void nv_mcp55_thaw(struct ata_port *ap) mask = readl(mmio_base + NV_INT_ENABLE_MCP55); mask |= (NV_INT_MASK_MCP55 << shift); writel(mask, mmio_base + NV_INT_ENABLE_MCP55); - ata_sff_thaw(ap); } static void nv_adma_error_handler(struct ata_port *ap)
On mcp55, nIEN gets stuck once set and liteon blueray rom iHOS104-08 violates ATA specification and fails to set I on D2H Reg FIS if nIEN is set when the command was issued. When the other party is following the spec, both devices can work fine but when the two flaws are put together, they can't talk to each other. mcp55 has its own IRQ masking mechanism and there's no reason to mess with nIEN in the first place. Fix it by dropping nIEN diddling from nv_mcp55_freeze/thaw(). This was originally reported by Cengiz. Although Cengiz hasn't verified the fix yet, I could reproduce this problem and verfiy the fix. Even if Cengiz is experiencing different or additional problems, this patch is needed. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Cengiz Günay <cgunay@emory.edu> Cc: stable@kernel.org --- drivers/ata/sata_nv.c | 2 -- 1 file changed, 2 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html