Don't allocate a temporary buffer to hold a NUL-terminated copy of the NAME/INFO string from the wmfw/bin. It can be printed directly to the log. Also limit the maximum number of characters that will be logged from this string.
The NAME/INFO blocks in the firmware files are an array of characters with a length, not a NUL-terminated C string. The original code allocated a temporary buffer to make a NUL-terminated copy of the string and then passed that to dev_info(). There's no need for this: printf formatting can use "%.*s" to print a character array of a given length.
Signed-off-by: Richard Fitzgerald rf@opensource.cirrus.com --- No changes since V1 --- drivers/firmware/cirrus/cs_dsp.c | 35 +++++++------------------------- 1 file changed, 7 insertions(+), 28 deletions(-)
diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c index 89fd63205a6e..bf25107a98ee 100644 --- a/drivers/firmware/cirrus/cs_dsp.c +++ b/drivers/firmware/cirrus/cs_dsp.c @@ -12,6 +12,7 @@ #include <linux/ctype.h> #include <linux/debugfs.h> #include <linux/delay.h> +#include <linux/minmax.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/seq_file.h> @@ -1473,7 +1474,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware, const struct wmfw_region *region; const struct cs_dsp_region *mem; const char *region_name; - char *text = NULL; struct cs_dsp_buf *buf; unsigned int reg; int regions = 0; @@ -1545,15 +1545,15 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware,
region_name = "Unknown"; reg = 0; - text = NULL; offset = le32_to_cpu(region->offset) & 0xffffff; type = be32_to_cpu(region->type) & 0xff;
switch (type) { + case WMFW_INFO_TEXT: case WMFW_NAME_TEXT: - region_name = "Firmware name"; - text = kzalloc(le32_to_cpu(region->len) + 1, - GFP_KERNEL); + region_name = "Info/Name"; + cs_dsp_info(dsp, "%s: %.*s\n", file, + min(le32_to_cpu(region->len), 100), region->data); break; case WMFW_ALGORITHM_DATA: region_name = "Algorithm"; @@ -1561,11 +1561,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware, if (ret != 0) goto out_fw; break; - case WMFW_INFO_TEXT: - region_name = "Information"; - text = kzalloc(le32_to_cpu(region->len) + 1, - GFP_KERNEL); - break; case WMFW_ABSOLUTE: region_name = "Absolute"; reg = offset; @@ -1599,13 +1594,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware, regions, le32_to_cpu(region->len), offset, region_name);
- if (text) { - memcpy(text, region->data, le32_to_cpu(region->len)); - cs_dsp_info(dsp, "%s: %s\n", file, text); - kfree(text); - text = NULL; - } - if (reg) { buf = cs_dsp_buf_alloc(region->data, le32_to_cpu(region->len), @@ -1647,7 +1635,6 @@ static int cs_dsp_load(struct cs_dsp *dsp, const struct firmware *firmware, out_fw: regmap_async_complete(regmap); cs_dsp_buf_free(&buf_list); - kfree(text);
if (ret == -EOVERFLOW) cs_dsp_err(dsp, "%s: file content overflows file data\n", file); @@ -2180,7 +2167,6 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware struct cs_dsp_alg_region *alg_region; const char *region_name; int ret, pos, blocks, type, offset, reg, version; - char *text = NULL; struct cs_dsp_buf *buf;
if (!firmware) @@ -2249,7 +2235,8 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware region_name = "Unknown"; switch (type) { case (WMFW_NAME_TEXT << 8): - text = kzalloc(le32_to_cpu(blk->len) + 1, GFP_KERNEL); + cs_dsp_info(dsp, "%s: %.*s\n", dsp->fw_name, + min(le32_to_cpu(blk->len), 100), blk->data); break; case (WMFW_INFO_TEXT << 8): case (WMFW_METADATA << 8): @@ -2321,13 +2308,6 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware break; }
- if (text) { - memcpy(text, blk->data, le32_to_cpu(blk->len)); - cs_dsp_info(dsp, "%s: %s\n", dsp->fw_name, text); - kfree(text); - text = NULL; - } - if (reg) { buf = cs_dsp_buf_alloc(blk->data, le32_to_cpu(blk->len), @@ -2367,7 +2347,6 @@ static int cs_dsp_load_coeff(struct cs_dsp *dsp, const struct firmware *firmware out_fw: regmap_async_complete(regmap); cs_dsp_buf_free(&buf_list); - kfree(text);
if (ret == -EOVERFLOW) cs_dsp_err(dsp, "%s: file content overflows file data\n", file);