staging/csr: Use kmemdup rather than duplicating its implementation
Found with coccicheck. The semantic patch that makes this change is available in scripts/coccinelle/api/memdup.cocci. Signed-off-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -819,15 +819,15 @@ unifi_write(struct file *filp, const char *p, size_t len, loff_t *poff)
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unifi_trace(priv, UDBG2, "unifi_write: signal 0x%.4X len:%d\n",
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sig_id, signal_size);
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/* Allocate a buffer for the signal */
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signal_buf = kmalloc(signal_size, GFP_KERNEL);
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/* Allocate a buffer for the signal */
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signal_buf = kmemdup(bulkdata.d[0].os_data_ptr, signal_size,
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GFP_KERNEL);
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if (!signal_buf) {
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unifi_net_data_free(priv, &bulkdata.d[0]);
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return -ENOMEM;
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}
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/* Get the signal from the os_data_ptr */
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memcpy(signal_buf, bulkdata.d[0].os_data_ptr, signal_size);
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signal_buf[5] = (pcli->sender_id >> 8) & 0xff;
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if (signal_size < len) {
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