EDAC/altera: Delete an inappropriate dma_free_coherent() call

commit ff2a66d upstream.

dma_free_coherent() must only be called if the corresponding
dma_alloc_coherent() call has succeeded. Calling it when the allocation fails
leads to undefined behavior.

Delete the wrong call.

  [ bp: Massage commit message. ]

Fixes: 71bcada ("edac: altera: Add Altera SDRAM EDAC support")
Signed-off-by: Salah Triki <salah.triki@gmail.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Dinh Nguyen <dinguyen@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/aIrfzzqh4IzYtDVC@pc
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: salah-triki

drivers/edac/altera_edac.c

@@ -127,7 +127,6 @@ static ssize_t altr_sdr_mc_err_inject_write(struct file *file,
 
 	ptemp = dma_alloc_coherent(mci->pdev, 16, &dma_handle, GFP_KERNEL);
 	if (!ptemp) {
-		dma_free_coherent(mci->pdev, 16, ptemp, dma_handle);
 		edac_printk(KERN_ERR, EDAC_MC,
 			    "Inject: Buffer Allocation error\n");
 		return -ENOMEM;