From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Andrzej Siewior Subject: [PATCH] net/niu: remove one superfluous dma mask check Date: Thu, 3 May 2012 20:22:00 +0200 Message-ID: <1336069320-23639-1-git-send-email-bigeasy@linutronix.de> Cc: netdev@vger.kernel.org, Sebastian Andrzej Siewior To: "David S. Miller" Return-path: Received: from www.linutronix.de ([62.245.132.108]:52423 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754345Ab2ECSUk (ORCPT ); Thu, 3 May 2012 14:20:40 -0400 Sender: netdev-owner@vger.kernel.org List-ID: The idea here seems to be to get a 44bit DMA mask working and if this fails it should fallback to a 32bit DMA mask. The dma_mask variable is assigned once to 44bit and never updated. pci_set_dma_mask() and pci_set_consistent_dma_mask() are both implemented as functions so there is no evil macro which might update dma_mask. Looking at the assembly, I see a call to dma_set_mask() followed by dma_supported() and then a jump passed the second dma_set_mask(). The only way to get to second dma_set_mask() call is by an error code in the first one. So I hereby remove the check since it looks superfluous. Please ignore the path if there is black magic involved. Signed-off-by: Sebastian Andrzej Siewior --- drivers/net/ethernet/sun/niu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c index c99b3b0..703c8cc 100644 --- a/drivers/net/ethernet/sun/niu.c +++ b/drivers/net/ethernet/sun/niu.c @@ -9838,7 +9838,7 @@ static int __devinit niu_pci_init_one(struct pci_dev *pdev, goto err_out_release_parent; } } - if (err || dma_mask == DMA_BIT_MASK(32)) { + if (err) { err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (err) { dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); -- 1.7.10