forked from Minki/linux
rsi: Fix failure to load firmware after memory leak fix and fix the leak
Fixes commiteae79b4f3e
("rsi: fix memory leak in rsi_load_ta_instructions()") which stopped the driver from functioning. Firmware data has been allocated using vmalloc(), resulting in memory that cannot be used for DMA. Hence the firmware was first copied to a buffer allocated with kmalloc() in the original code. This patch reverts the commit and only calls "kfree()" to release the buffer after sending the data. This fixes the memory leak without breaking the driver. Add a comment to the kmemdup() calls to explain why this is done, and abort if memory allocation fails. Tested on a Topic Miami-Florida board which contains the rsi SDIO chip. Also added the same kfree() call to the USB glue driver. This was not tested on actual hardware though, as I only have the SDIO version. Fixes:eae79b4f3e
("rsi: fix memory leak in rsi_load_ta_instructions()") Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl> Cc: stable@vger.kernel.org Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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@ -172,6 +172,7 @@ static int rsi_load_ta_instructions(struct rsi_common *common)
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(struct rsi_91x_sdiodev *)adapter->rsi_dev;
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(struct rsi_91x_sdiodev *)adapter->rsi_dev;
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u32 len;
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u32 len;
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u32 num_blocks;
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u32 num_blocks;
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const u8 *fw;
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const struct firmware *fw_entry = NULL;
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const struct firmware *fw_entry = NULL;
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u32 block_size = dev->tx_blk_size;
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u32 block_size = dev->tx_blk_size;
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int status = 0;
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int status = 0;
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@ -200,6 +201,10 @@ static int rsi_load_ta_instructions(struct rsi_common *common)
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return status;
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return status;
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}
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}
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/* Copy firmware into DMA-accessible memory */
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fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
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if (!fw)
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return -ENOMEM;
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len = fw_entry->size;
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len = fw_entry->size;
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if (len % 4)
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if (len % 4)
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@ -210,7 +215,8 @@ static int rsi_load_ta_instructions(struct rsi_common *common)
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rsi_dbg(INIT_ZONE, "%s: Instruction size:%d\n", __func__, len);
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rsi_dbg(INIT_ZONE, "%s: Instruction size:%d\n", __func__, len);
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rsi_dbg(INIT_ZONE, "%s: num blocks: %d\n", __func__, num_blocks);
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rsi_dbg(INIT_ZONE, "%s: num blocks: %d\n", __func__, num_blocks);
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status = rsi_copy_to_card(common, fw_entry->data, len, num_blocks);
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status = rsi_copy_to_card(common, fw, len, num_blocks);
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kfree(fw);
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release_firmware(fw_entry);
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release_firmware(fw_entry);
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return status;
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return status;
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}
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}
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@ -146,7 +146,10 @@ static int rsi_load_ta_instructions(struct rsi_common *common)
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return status;
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return status;
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}
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}
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/* Copy firmware into DMA-accessible memory */
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fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
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fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
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if (!fw)
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return -ENOMEM;
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len = fw_entry->size;
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len = fw_entry->size;
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if (len % 4)
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if (len % 4)
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@ -158,6 +161,7 @@ static int rsi_load_ta_instructions(struct rsi_common *common)
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rsi_dbg(INIT_ZONE, "%s: num blocks: %d\n", __func__, num_blocks);
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rsi_dbg(INIT_ZONE, "%s: num blocks: %d\n", __func__, num_blocks);
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status = rsi_copy_to_card(common, fw, len, num_blocks);
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status = rsi_copy_to_card(common, fw, len, num_blocks);
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kfree(fw);
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release_firmware(fw_entry);
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release_firmware(fw_entry);
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return status;
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return status;
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}
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}
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