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| author | Arnd Bergmann <arnd@arndb.de> | 2015-02-24 10:47:27 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-03-23 14:13:42 +0100 |
| commit | d34712d2e3db9b241d0484a6e3839c6b7ef9df78 (patch) | |
| tree | b1c6d620fdd4ecac2570fbbaea5d5e2ff7dd3e98 /drivers/mmc/host/sunxi-mmc.c | |
| parent | 5f2e097ce0894c0882577cebf44f4e1db01d9f98 (diff) | |
| download | linux-d34712d2e3db9b241d0484a6e3839c6b7ef9df78.tar.bz2 | |
mmc: sunxi: avoid invalid pointer calculation
The sunxi mmc driver tries to calculate a dma address by using pointer
arithmetic, which causes a warning when dma_addr_t is wider than a pointer:
drivers/mmc/host/sunxi-mmc.c: In function 'sunxi_mmc_init_idma_des':
drivers/mmc/host/sunxi-mmc.c:296:35: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
struct sunxi_idma_des *pdes_pa = (struct sunxi_idma_des *)host->sg_dma;
^
To avoid this warning and to simplify the logic, this changes
the code to avoid the cast and calculate the correct address
manually. The behavior should be unchanged.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: David Lanzendörfer <david.lanzendoerfer@o2s.ch>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sunxi-mmc.c')
| -rw-r--r-- | drivers/mmc/host/sunxi-mmc.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c index 459ed1b601db..48ed092543bb 100644 --- a/drivers/mmc/host/sunxi-mmc.c +++ b/drivers/mmc/host/sunxi-mmc.c @@ -293,7 +293,7 @@ static void sunxi_mmc_init_idma_des(struct sunxi_mmc_host *host, struct mmc_data *data) { struct sunxi_idma_des *pdes = (struct sunxi_idma_des *)host->sg_cpu; - struct sunxi_idma_des *pdes_pa = (struct sunxi_idma_des *)host->sg_dma; + dma_addr_t next_desc = host->sg_dma; int i, max_len = (1 << host->idma_des_size_bits); for (i = 0; i < data->sg_len; i++) { @@ -305,8 +305,9 @@ static void sunxi_mmc_init_idma_des(struct sunxi_mmc_host *host, else pdes[i].buf_size = data->sg[i].length; + next_desc += sizeof(struct sunxi_idma_des); pdes[i].buf_addr_ptr1 = sg_dma_address(&data->sg[i]); - pdes[i].buf_addr_ptr2 = (u32)&pdes_pa[i + 1]; + pdes[i].buf_addr_ptr2 = (u32)next_desc; } pdes[0].config |= SDXC_IDMAC_DES0_FD; |