/* * Helper function for splitting a string into an argv-like array. */ #include #include #include #include #include static int count_argc(const char *str) { int count = 0; bool was_space; for (was_space = true; *str; str++) { if (isspace(*str)) { was_space = true; } else if (was_space) { was_space = false; count++; } } return count; } /** * argv_free - free an argv * @argv - the argument vector to be freed * * Frees an argv and the strings it points to. */ void argv_free(char **argv) { argv--; kfree(argv[0]); kfree(argv); } EXPORT_SYMBOL(argv_free); /** * argv_split - split a string at whitespace, returning an argv * @gfp: the GFP mask used to allocate memory * @str: the string to be split * @argcp: returned argument count * * Returns an array of pointers to strings which are split out from * @str. This is performed by strictly splitting on white-space; no * quote processing is performed. Multiple whitespace characters are * considered to be a single argument separator. The returned array * is always NULL-terminated. Returns NULL on memory allocation * failure. * * The source string at `str' may be undergoing concurrent alteration via * userspace sysctl activity (at least). The argv_split() implementation * attempts to handle this gracefully by taking a local copy to work on. */ char **argv_split(gfp_t gfp, const char *str, int *argcp) { char *argv_str; bool was_space; char **argv, **argv_ret; int argc; argv_str = kstrndup(str, KMALLOC_MAX_SIZE - 1, gfp); if (!argv_str) return NULL; argc = count_argc(argv_str); argv = kmalloc(sizeof(*argv) * (argc + 2), gfp); if (!argv) { kfree(argv_str); return NULL; } *argv = argv_str; argv_ret = ++argv; for (was_space = true; *argv_str; argv_str++) { if (isspace(*argv_str)) { was_space = true; *argv_str = 0; } else if (was_space) { was_space = false; *argv++ = argv_str; } } *argv = NULL; if (argcp) *argcp = argc; return argv_ret; } EXPORT_SYMBOL(argv_split); xt.git/diff/drivers/usb/misc/sisusbvga/Kconfig?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>diff
path: root/drivers/usb/misc/sisusbvga/Kconfig
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 19:03:21 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 20:22:18 +0100
commitaaaec6fc755447a1d056765b11b24d8ff2b81366 (patch)
treea7f4167960ee1df86739905b6ccdeb95465bfe5f /drivers/usb/misc/sisusbvga/Kconfig
parent08d85f3ea99f1eeafc4e8507936190e86a16ee8c (diff)
x86/irq: Make irq activate operations symmetric
The recent commit which prevents double activation of interrupts unearthed interesting code in x86. The code (ab)uses irq_domain_activate_irq() to reconfigure an already activated interrupt. That trips over the prevention code now. Fix it by deactivating the interrupt before activating the new configuration. Fixes: 08d85f3ea99f1 "irqdomain: Avoid activating interrupts more than once" Reported-and-tested-by: Mike Galbraith <efault@gmx.de> Reported-and-tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701311901580.3457@nanos
Diffstat (limited to 'drivers/usb/misc/sisusbvga/Kconfig')