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esdhc: memset mmc struct before putting into use

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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>
This commit is contained in:
Haijun.Zhang 2013-10-31 09:38:18 +08:00 • committed by Pantelis Antoniou
parent 511948b2cb
commit a54d681132
1 changed files with 1 additions and 0 deletions
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1
drivers/mmc/fsl_esdhc.c
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@ -533,6 +533,7 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
if (!mmc)
return -ENOMEM;
memset(mmc, 0, sizeof(struct mmc));
sprintf(mmc->name, "FSL_SDHC");
regs = (struct fsl_esdhc *)cfg->esdhc_base;