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authorHeiner Kallweit <hkallweit1@gmail.com>2015-12-06 21:56:33 +0100
committerTejun Heo <tj@kernel.org>2015-12-07 09:40:50 -0500
commit7e22c0024cf89404407f19955eab39b6d66de7b6 (patch)
tree6f8731f8591421312c969ea0782073f38ab16ecd /drivers/ata/libata-core.c
parent2ef42f4a7ea3f44606ae8ef444f98a6720e82f7d (diff)
ata: core: fix irq description on AHCI single irq systems
On my machine with single irq AHCI just the PCI id is printed as description in /proc/interrupts. I found a related discussion from beginning of this year: http://www.gossamer-threads.com/lists/linux/kernel/2117335 Seems like 4f37b504768c ("libata: Use dev_name() for request_irq() to distinguish devices") tried to fix displaying a proper interrupt description for one scenario but broke it for another one. The mentioned discussion ended in the current situation being considered as broken but w/o a patch to fix it. The following patch is based on a proposal in this mail thread. Now the interrupt is properly described as: PCI-MSI 512000-edge ahci[0000:00:1f.2] By combining both values also the scenario that commit 4f37b504768c ("libata: Use dev_name() for request_irq() to distinguish devices") refers to should still be fine. There it should look like this now: ahci[20100000.ide] Using managed memory allocation ensures that the irq description lives at least as long as the interrupt. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Diffstat (limited to 'drivers/ata/libata-core.c')
-rw-r--r--drivers/ata/libata-core.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b79cb10e289e..60e368610c74 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6223,6 +6223,7 @@ int ata_host_activate(struct ata_host *host, int irq,
struct scsi_host_template *sht)
{
int i, rc;
+ char *irq_desc;
rc = ata_host_start(host);
if (rc)
@@ -6234,8 +6235,14 @@ int ata_host_activate(struct ata_host *host, int irq,
return ata_host_register(host, sht);
}
+ irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]",
+ dev_driver_string(host->dev),
+ dev_name(host->dev));
+ if (!irq_desc)
+ return -ENOMEM;
+
rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
- dev_name(host->dev), host);
+ irq_desc, host);
if (rc)
return rc;