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Date: Tue, 19 Feb 2013 14:06:26 +0100 From: Borislav Petkov <bp@...en8.de> To: Mauro Carvalho Chehab <mchehab@...hat.com> Cc: balbi@...com, Greg KH <gregkh@...uxfoundation.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Steven Rostedt <rostedt@...dmis.org>, Frederic Weisbecker <fweisbec@...il.com>, Ingo Molnar <mingo@...hat.com>, JBottomley@...allels.com, linux-scsi@...r.kernel.org, davem@...emloft.net, netdev@...r.kernel.org, Doug Thompson <dougthompson@...ssion.com>, linux-edac@...r.kernel.org, rjw@...k.pl, linux-pm@...r.kernel.org Subject: Re: SYSFS "errors" On Tue, Feb 19, 2013 at 09:46:40AM -0300, Mauro Carvalho Chehab wrote: > Ah, now I see what you're meaning. That would require to dynamically > create a per-mci DEVICE_ATTR(). Dude, look at the code, we do that already. And you're using it with dev_attr_sdram_scrub_rate. Simply change the permissions of the attribute before calling device_create_file. pseudo: umode_t mode = 0; if (mci->set...) mode |= S_IWUSR; if (mci->get...) mode |= S_IRUGO; dev_attr_sdram_scrub_rate.attr.mode = mode; device_create_file(&mci->dev, &dev_attr_sdram_scrub_rate); > No, on both cases, open() will return an error (-ENOENT against -EPERM). What if it is a shell script doing: cat /sys/devices/system/edac/mc/mc0/sdram_scrub_rate or similar? Simply fixing the permissions fixes *all* possible cases. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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