Commit b081b34d authored by sumit.saxena@avagotech.com's avatar sumit.saxena@avagotech.com Committed by Greg Kroah-Hartman

megaraid_sas: Do not use PAGE_SIZE for max_sectors

commit 357ae967 upstream.

Do not use PAGE_SIZE marco to calculate max_sectors per I/O
request. Driver code assumes PAGE_SIZE will be always 4096 which can
lead to wrongly calculated value if PAGE_SIZE is not 4096. This issue
was reported in Ubuntu Bugzilla Bug #1475166.
Signed-off-by: default avatarSumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: default avatarKashyap Desai <kashyap.desai@avagotech.com>
Reviewed-by: default avatarTomas Henzl <thenzl@redhat.com>
Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b9f2d7c9
......@@ -334,6 +334,8 @@ enum MR_EVT_ARGS {
MR_EVT_ARGS_GENERIC,
};
#define SGE_BUFFER_SIZE 4096
/*
* define constants for device list query options
*/
......
......@@ -3821,7 +3821,7 @@ static int megasas_init_fw(struct megasas_instance *instance)
}
}
instance->max_sectors_per_req = instance->max_num_sge *
PAGE_SIZE / 512;
SGE_BUFFER_SIZE / 512;
if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
instance->max_sectors_per_req = tmp_sectors;
......
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