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authorMichael Kelley <mikelley@microsoft.com>2018-08-02 06:08:25 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-08-02 11:20:59 +0300
commit572086325ce9a9e348b8748e830653f3959e88b6 (patch)
tree9ddba84c9cd5aec69f778524eff83f5d64399af9 /drivers/hv
parent6ba34171bcbd10321c6cf554e0c1144d170f9d1a (diff)
downloadlinux-572086325ce9a9e348b8748e830653f3959e88b6.tar.xz
Drivers: hv: vmbus: Cleanup synic memory free path
clk_evt memory is not being freed when the synic is shutdown or when there is an allocation error. Add the appropriate kfree() call, along with a comment to clarify how the memory gets freed after an allocation error. Make the free path consistent by removing checks for NULL since kfree() and free_page() already do the check. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/hv.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 312fe5ed7c40..748a1c4172a6 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -242,6 +242,10 @@ int hv_synic_alloc(void)
return 0;
err:
+ /*
+ * Any memory allocations that succeeded will be freed when
+ * the caller cleans up by calling hv_synic_free()
+ */
return -ENOMEM;
}
@@ -254,12 +258,10 @@ void hv_synic_free(void)
struct hv_per_cpu_context *hv_cpu
= per_cpu_ptr(hv_context.cpu_context, cpu);
- if (hv_cpu->synic_event_page)
- free_page((unsigned long)hv_cpu->synic_event_page);
- if (hv_cpu->synic_message_page)
- free_page((unsigned long)hv_cpu->synic_message_page);
- if (hv_cpu->post_msg_page)
- free_page((unsigned long)hv_cpu->post_msg_page);
+ kfree(hv_cpu->clk_evt);
+ free_page((unsigned long)hv_cpu->synic_event_page);
+ free_page((unsigned long)hv_cpu->synic_message_page);
+ free_page((unsigned long)hv_cpu->post_msg_page);
}
kfree(hv_context.hv_numa_map);