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authorAndrea Parri (Microsoft) <parri.andrea@gmail.com>2020-04-06 02:15:14 +0200
committerWei Liu <wei.liu@kernel.org>2020-05-20 09:13:19 +0000
commit7769e18c201aa88eade5556faf9da7f2bc15bb8a (patch)
treec851e261d39bc420dd9d6e7920ccefe02c68e2c4 /drivers/hv
parent7527810573436f00e582d3d5ef2eb3c027c98d7d (diff)
scsi: storvsc: Re-init stor_chns when a channel interrupt is re-assigned
For each storvsc_device, storvsc keeps track of the channel target CPUs associated to the device (alloced_cpus) and it uses this information to fill a "cache" (stor_chns) mapping CPU->channel according to a certain heuristic. Update the alloced_cpus mask and the stor_chns array when a channel of the storvsc device is re-assigned to a different CPU. Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: <linux-scsi@vger.kernel.org> Link: https://lore.kernel.org/r/20200406001514.19876-12-parri.andrea@gmail.com Reviewed-by; Long Li <longli@microsoft.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> [ wei: fix a small issue reported by kbuild test robot <lkp@intel.com> ] Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/vmbus_drv.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 5d24b25fb5aa..28c009c7a9cd 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1777,6 +1777,10 @@ static ssize_t target_cpu_store(struct vmbus_channel *channel,
* in on a CPU that is different from the channel target_cpu value.
*/
+ if (channel->change_target_cpu_callback)
+ (*channel->change_target_cpu_callback)(channel,
+ channel->target_cpu, target_cpu);
+
channel->target_cpu = target_cpu;
channel->target_vp = hv_cpu_number_to_vp_number(target_cpu);
channel->numa_node = cpu_to_node(target_cpu);