litmus-rt-ext-res.git - LITMUS^RT with extended reservations for Forbidden Zones paper @ RTAS'20

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author	Richard Weinberger <richard@nod.at>	2016-10-19 06:43:07 -0400
committer	Richard Weinberger <richard@nod.at>	2016-10-19 18:06:11 -0400
commit	c83ed4c9dbb358b9e7707486e167e940d48bfeed (patch)
tree	89f1cd092e2b89f71407cdf784d3e5b7c95d1f68 /lib/debugobjects.c
parent	884a3b647809cb31cf6bd948f814e93753b38502 (diff)

ubifs: Abort readdir upon error

If UBIFS is facing an error while walking a directory, it reports this error and ubifs_readdir() returns the error code. But the VFS readdir logic does not make the getdents system call fail in all cases. When the readdir cursor indicates that more entries are present, the system call will just return and the libc wrapper will try again since it also knows that more entries are present. This causes the libc wrapper to busy loop for ever when a directory is corrupted on UBIFS. A common approach do deal with corrupted directory entries is skipping them by setting the cursor to the next entry. On UBIFS this approach is not possible since we cannot compute the next directory entry cursor position without reading the current entry. So all we can do is setting the cursor to the "no more entries" position and make getdents exit. Cc: stable@vger.kernel.org Signed-off-by: Richard Weinberger <richard@nod.at>

Diffstat (limited to 'lib/debugobjects.c')

0 files changed, 0 insertions, 0 deletions

/* * Cadence SPI controller driver (master mode only) * * Copyright (C) 2008 - 2014 Xilinx, Inc. * * based on Blackfin On-Chip SPI Driver (spi_bfin5xx.c) * * This program is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License version 2 as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of_irq.h> #include <linux/of_address.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/spi/spi.h> /* Name of this driver */ #define CDNS_SPI_NAME "cdns-spi" /* Register offset definitions */ #define CDNS_SPI_CR 0x00 /* Configuration Register, RW */ #define CDNS_SPI_ISR 0x04 /* Interrupt Status Register, RO */ #define CDNS_SPI_IER 0x08 /* Interrupt Enable Register, WO */ #define CDNS_SPI_IDR 0x0c /* Interrupt Disable Register, WO */ #define CDNS_SPI_IMR 0x10 /* Interrupt Enabled Mask Register, RO */ #define CDNS_SPI_ER 0x14 /* Enable/Disable Register, RW */ #define CDNS_SPI_DR 0x18 /* Delay Register, RW */ #define CDNS_SPI_TXD 0x1C /* Data Transmit Register, WO */ #define CDNS_SPI_RXD 0x20 /* Data Receive Register, RO */ #define CDNS_SPI_SICR 0x24 /* Slave Idle Count Register, RW */ #define CDNS_SPI_THLD 0x28 /* Transmit FIFO Watermark Register,RW */ #define SPI_AUTOSUSPEND_TIMEOUT 3000 /* * SPI Configuration Register bit Masks * * This register contains various control bits that affect the operation * of the SPI controller */ #define CDNS_SPI_CR_MANSTRT 0x00010000 /* Manual TX Start */ #define CDNS_SPI_CR_CPHA 0x00000004 /* Clock Phase Control */ #define CDNS_SPI_CR_CPOL 0x00000002 /* Clock Polarity Control */ #define CDNS_SPI_CR_SSCTRL 0x00003C00 /* Slave Select Mask */ #define CDNS_SPI_CR_PERI_SEL 0x00000200 /* Peripheral Select Decode */ #define CDNS_SPI_CR_BAUD_DIV 0x00000038 /* Baud Rate Divisor Mask */ #define CDNS_SPI_CR_MSTREN 0x00000001 /* Master Enable Mask */ #define CDNS_SPI_CR_MANSTRTEN 0x00008000 /* Manual TX Enable Mask */ #define CDNS_SPI_CR_SSFORCE 0x00004000 /* Manual SS Enable Mask */ #define CDNS_SPI_CR_BAUD_DIV_4 0x00000008 /* Default Baud Div Mask */ #define CDNS_SPI_CR_DEFAULT (CDNS_SPI_CR_MSTREN | \ CDNS_SPI_CR_SSCTRL | \ CDNS_SPI_CR_SSFORCE | \ CDNS_SPI_CR_BAUD_DIV_4) /* * SPI Configuration Register - Baud rate and slave select * * These are the values used in the calculation of baud rate divisor and * setting the slave select. */ #define CDNS_SPI_BAUD_DIV_MAX 7 /* Baud rate divisor maximum */ #define CDNS_SPI_BAUD_DIV_MIN 1 /* Baud rate divisor minimum */ #define CDNS_SPI_BAUD_DIV_SHIFT 3 /* Baud rate divisor shift in CR */ #define CDNS_SPI_SS_SHIFT 10 /* Slave Select field shift in CR */ #define CDNS_SPI_SS0 0x1 /* Slave Select zero */ /* * SPI Interrupt Registers bit Masks *


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