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mmc: Use map_sysmem() with buffers in the mmc command

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The current implementation casts an address to a pointer. Make it more
sandbox-friendly by using map_sysmem().

Rename the variable to 'ptr' since it is a pointer, not an address.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2024-09-01 16:26:28 -06:00
committed by Tom Rini
parent f452e8f092
commit cc6a1b6902
1 changed files with 9 additions and 6 deletions
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15
cmd/mmc.c
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@@ -8,6 +8,7 @@
#include <command.h>
#include <console.h>
#include <display_options.h>
#include <mapmem.h>
#include <memalign.h>
#include <mmc.h>
#include <part.h>
@@ -349,12 +350,12 @@ static int do_mmc_read(struct cmd_tbl *cmdtp, int flag,
{
struct mmc *mmc;
u32 blk, cnt, n;
void *addr;
void *ptr;
if (argc != 4)
return CMD_RET_USAGE;
addr = (void *)hextoul(argv[1], NULL);
ptr = map_sysmem(hextoul(argv[1], NULL), 0);
blk = hextoul(argv[2], NULL);
cnt = hextoul(argv[3], NULL);
@@ -365,8 +366,9 @@ static int do_mmc_read(struct cmd_tbl *cmdtp, int flag,
printf("MMC read: dev # %d, block # %d, count %d ... ",
curr_device, blk, cnt);
n = blk_dread(mmc_get_blk_desc(mmc), blk, cnt, addr);
n = blk_dread(mmc_get_blk_desc(mmc), blk, cnt, ptr);
printf("%d blocks read: %s\n", n, (n == cnt) ? "OK" : "ERROR");
unmap_sysmem(ptr);
return (n == cnt) ? CMD_RET_SUCCESS : CMD_RET_FAILURE;
}
@@ -442,12 +444,12 @@ static int do_mmc_write(struct cmd_tbl *cmdtp, int flag,
{
struct mmc *mmc;
u32 blk, cnt, n;
void *addr;
void *ptr;
if (argc != 4)
return CMD_RET_USAGE;
addr = (void *)hextoul(argv[1], NULL);
ptr = map_sysmem(hextoul(argv[1], NULL), 0);
blk = hextoul(argv[2], NULL);
cnt = hextoul(argv[3], NULL);
@@ -462,8 +464,9 @@ static int do_mmc_write(struct cmd_tbl *cmdtp, int flag,
printf("Error: card is write protected!\n");
return CMD_RET_FAILURE;
}
n = blk_dwrite(mmc_get_blk_desc(mmc), blk, cnt, addr);
n = blk_dwrite(mmc_get_blk_desc(mmc), blk, cnt, ptr);
printf("%d blocks written: %s\n", n, (n == cnt) ? "OK" : "ERROR");
unmap_sysmem(ptr);
return (n == cnt) ? CMD_RET_SUCCESS : CMD_RET_FAILURE;
}