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authorAndreas Werner <andreas.werner@men.de>2015-12-04 18:12:49 +0100
committerTejun Heo <tj@kernel.org>2015-12-07 10:25:57 -0500
commitea013a9b205b47b1fcbc72522146fad560af0712 (patch)
tree4cb4246efacefc985f78987c88d36232a9d928fd /drivers/ata
parentd98f1cd0a3b70ea91f1dfda3ac36c3b2e1a4d5e2 (diff)
downloadlinux-ea013a9b205b47b1fcbc72522146fad560af0712.tar.bz2
libata-eh.c: Introduce new ata port flag for controller which lockup on read log page
Some controller lockup on a ata_read_log_page. Add new ata port flag ATA_FLAG_NO_LOG_PAGE which can used to blacklist a controller. If this flag is set, any attempt to read a log page returns an error without actually issuing the command. Signed-off-by: Andreas Werner <andreas.werner@men.de> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-eh.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index cb0508af1459..961acc788f44 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1505,12 +1505,20 @@ static const char *ata_err_string(unsigned int err_mask)
unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
u8 page, void *buf, unsigned int sectors)
{
+ unsigned long ap_flags = dev->link->ap->flags;
struct ata_taskfile tf;
unsigned int err_mask;
bool dma = false;
DPRINTK("read log page - log 0x%x, page 0x%x\n", log, page);
+ /*
+ * Return error without actually issuing the command on controllers
+ * which e.g. lockup on a read log page.
+ */
+ if (ap_flags & ATA_FLAG_NO_LOG_PAGE)
+ return AC_ERR_DEV;
+
retry:
ata_tf_init(dev, &tf);
if (dev->dma_mode && ata_id_has_read_log_dma_ext(dev->id) &&