From dd05add7b2b6004c5fa3a1f276f56d8668f86b65 Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Sat, 26 Sep 2026 19:20:30 -0300 Subject: netfs: zero the tail of a short DIO/unbuffered read The buffered read collector zero-fills the tail of a short read that stops below the inode's i_size (netfs_clear_unread()), so a read that races an extending write still returns the expected number of bytes. The non-buffered collector path does no such thing: it just records how much was transferred. Add the same zero-fill for the non-buffered case, gated on NETFS_SREQ_CLEAR_TAIL: a subreq's source sets that flag when a short result from it is known to be safe to treat as a hole, as opposed to NETFS_SREQ_HIT_EOF, which means the read genuinely ran off the end of the file and should be reported short as-is. Only CLEAR_TAIL should zero-fill here; a real EOF must stay a real short read. No source currently sets CLEAR_TAIL on an unbuffered/DIO subrequest, so this is inert on its own -- a following change teaches cifs to set it in the one case that needs it. Fixes: e2d46f2ec332 ("netfs: Change the read result collector to only use one work item") Reviewed-by: David Howells Reviewed-by: Namjae Jeon Signed-off-by: Paulo Alcantara Cc: Christian Brauner Cc: Matthew Wilcox Cc: Ronnie Sahlberg Cc: Shyam Prasad N Cc: Tom Talpey Cc: Bharath SM Cc: stable@vger.kernel.org --- drivers/pinctrl/devicetree.h | 54 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 drivers/pinctrl/devicetree.h (limited to 'drivers/pinctrl/devicetree.h') diff --git a/drivers/pinctrl/devicetree.h b/drivers/pinctrl/devicetree.h new file mode 100644 index 000000000..def76aba9 --- /dev/null +++ b/drivers/pinctrl/devicetree.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Internal interface to pinctrl device tree integration + * + * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved. + */ + +#include + +struct device_node; +struct of_phandle_args; + +struct pinctrl; +struct pinctrl_dev; + +#ifdef CONFIG_OF + +void pinctrl_dt_free_maps(struct pinctrl *p); +int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev); + +int pinctrl_count_index_with_args(const struct device_node *np, + const char *list_name); + +int pinctrl_parse_index_with_args(const struct device_node *np, + const char *list_name, int index, + struct of_phandle_args *out_args); + +#else + +static inline int pinctrl_dt_to_map(struct pinctrl *p, + struct pinctrl_dev *pctldev) +{ + return 0; +} + +static inline void pinctrl_dt_free_maps(struct pinctrl *p) +{ +} + +static inline int pinctrl_count_index_with_args(const struct device_node *np, + const char *list_name) +{ + return -ENODEV; +} + +static inline int +pinctrl_parse_index_with_args(const struct device_node *np, + const char *list_name, int index, + struct of_phandle_args *out_args) +{ + return -ENODEV; +} + +#endif -- cgit v1.3.1