From 520a2c2741747062e75f91cd0faddb564fbc64d2 Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Tue, 14 Oct 2008 11:34:20 -0700
Subject: [SCSI] sd: fix computation of the full size of the device
When computing the full size of the device, we need to cast
sdkp->capacity before shifting, since in some configurations sector_t
can be a 32-bit number.
Also, change ffz(~x) to the more idiomatic ilog2(x).
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---
drivers/scsi/sd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'drivers/scsi/sd.c')
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 7e22aa7b8b8a..7ba70bef8b5d 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1436,7 +1436,7 @@ got_data:
{
char cap_str_2[10], cap_str_10[10];
- u64 sz = sdkp->capacity << ffz(~sector_size);
+ u64 sz = (u64)sdkp->capacity << ilog2(sector_size);
string_get_size(sz, STRING_UNITS_2, cap_str_2,
sizeof(cap_str_2));
--
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