esdhc: memset mmc struct before putting into use
authorHaijun.Zhang <Haijun.Zhang@freescale.com>
Thu, 31 Oct 2013 01:38:18 +0000 (09:38 +0800)
committerPantelis Antoniou <panto@antoniou-consulting.com>
Thu, 31 Oct 2013 07:55:34 +0000 (09:55 +0200)
commita54d68113261ad5da8ff43fd0d5ed811fb1d361d
tree0622e0c3c9b3c042f38f26f515dbca78f481e28f
parent511948b2cb1105fbec3e0f4cfb215e266860ae71
esdhc: memset mmc struct before putting into use

struct mmc should be clear to all '0' after malloc to avoid
unexpect variable value.

Like mmc->has_init = xxx.
In this case mmcinfo will believe the card had been initialized before
and skip the initialization.

Test on P5040 and T4240,
Error Log:

=> mmcinfo
Device: FSL_SDHC
Manufacturer ID: 0
OEM: 0
Name: Tran Speed: 0
Rd Block Len: 0
MMC version 0.0
High Capacity: No
Capacity: 0 Bytes
Bus Width: 0-bit
=>

Signed-off-by: Haijun Zhang <Haijun.Zhang@freescale.com>
Signed-off-by: Xie Shaohui-B21989 <B21989@freescale.com>
Tested-by: Ryan Barnett <rjbarnet@rockwellcollins.com>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
drivers/mmc/fsl_esdhc.c