s390/zcrypt: fix kmalloc 256k failure

Tests showed that under stress conditions the kernel may
temporary fail to allocate 256k with kmalloc. However,
this fix reworks the related code in the cca_findcard2()
function to use kvmalloc instead.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/drivers/s390/crypto/zcrypt_ccamisc.c b/drivers/s390/crypto/zcrypt_ccamisc.c
index 3f5b61351cde56e77e362b1b14ec133da48ea1aa..c793dcabd551c3cf238a725811baa00324d7a74b 100644 (file)
--- a/drivers/s390/crypto/zcrypt_ccamisc.c
+++ b/drivers/s390/crypto/zcrypt_ccamisc.c
@@ -1692,9 +1692,9 @@ int cca_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
        *nr_apqns = 0;
 
        /* fetch status of all crypto cards */
-       device_status = kmalloc_array(MAX_ZDEV_ENTRIES_EXT,
-                                     sizeof(struct zcrypt_device_status_ext),
-                                     GFP_KERNEL);
+       device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT,
+                                      sizeof(struct zcrypt_device_status_ext),
+                                      GFP_KERNEL);
        if (!device_status)
                return -ENOMEM;
        zcrypt_device_status_mask_ext(device_status);
@@ -1762,7 +1762,7 @@ int cca_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
                verify = 0;
        }
 
-       kfree(device_status);
+       kvfree(device_status);
        return rc;
 }
 EXPORT_SYMBOL(cca_findcard2);