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mmc-utils: add patch for cache size scaling

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Signed-off-by: Michael Heimpold <mhei@heimpold.de>
This commit is contained in:
Michael Heimpold 2020-02-18 22:29:53 +01:00
parent ebf6e1cc4c
commit 85bdb3f281
2 changed files with 35 additions and 1 deletions
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2
utils/mmc-utils/Makefile
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@ -8,7 +8,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=mmc-utils
PKG_RELEASE:=1
PKG_RELEASE:=2
PKG_SOURCE_PROTO:=git
PKG_SOURCE_URL:=https://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git

34
utils/mmc-utils/patches/0011-mmc-utils-Fix-scaling-of-cache-size.patch Normal file
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@ -0,0 +1,34 @@
From 8121cece25da8dad1dc91393f5285195997c71b1 Mon Sep 17 00:00:00 2001
From: Patrick Oppenlander <patrick.oppenlander@gmail.com>
Date: Fri, 14 Feb 2020 09:13:32 +1100
Subject: [PATCH] mmc-utils: Fix scaling of cache size
JESD84-B51 7.4.30 CACHE_SIZE [252:249] states that "the size is
indicated as multiple of kilobits". This is also supported by Table 39,
"e.MMC internal sizes and related Units / Granularities" which lists
"32Kb (=4KB)" as the cache size granularity for 4KiB native devices.
Signed-off-by: Patrick Oppenlander <patrick.oppenlander@gmail.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
---
mmc_cmds.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mmc_cmds.c b/mmc_cmds.c
index c006ef2..556c105 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -1427,8 +1427,8 @@ int do_read_extcsd(int nargs, char **argv)
printf("Power off notification [POWER_OFF_LONG_TIME: 0x%02x]\n",
ext_csd[247]);
printf("Cache Size [CACHE_SIZE] is %d KiB\n",
- ext_csd[249] << 0 | (ext_csd[250] << 8) |
- (ext_csd[251] << 16) | (ext_csd[252] << 24));
+ (ext_csd[249] << 0 | (ext_csd[250] << 8) |
+ (ext_csd[251] << 16) | (ext_csd[252] << 24)) / 8);
}
/* A441: Reserved [501:247]
--
2.17.1