add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mmc/core/sdio_io.c
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@@ -1,15 +1,12 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *  linux/drivers/mmc/core/sdio_io.c
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  *
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  *  Copyright 2007-2008 Pierre Ossman
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or (at
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- * your option) any later version.
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  */
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 #include <linux/export.h>
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+#include <linux/kernel.h>
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 #include <linux/mmc/host.h>
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 #include <linux/mmc/card.h>
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 #include <linux/mmc/sdio.h>
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@@ -136,7 +133,7 @@
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 err:
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 	pr_debug("SDIO: Failed to disable device %s\n", sdio_func_id(func));
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-	return -EIO;
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+	return ret;
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 }
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 EXPORT_SYMBOL_GPL(sdio_disable_func);
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@@ -204,6 +201,21 @@
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 	return min(mval, 512u); /* maximum size for byte mode */
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 }
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+/*
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+ * This is legacy code, which needs to be re-worked some day. Basically we need
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+ * to take into account the properties of the host, as to enable the SDIO func
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+ * driver layer to allocate optimal buffers.
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+ */
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+static inline unsigned int _sdio_align_size(unsigned int sz)
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+{
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+	/*
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+	 * FIXME: We don't have a system for the controller to tell
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+	 * the core about its problems yet, so for now we just 32-bit
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+	 * align the size.
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+	 */
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+	return ALIGN(sz, 4);
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+}
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+
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 /**
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  *	sdio_align_size - pads a transfer size to a more optimal value
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  *	@func: SDIO function
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@@ -231,7 +243,7 @@
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 	 * wants to increase the size up to a point where it
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 	 * might need more than one block.
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 	 */
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-	sz = mmc_align_data_size(func->card, sz);
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+	sz = _sdio_align_size(sz);
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 	/*
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 	 * If we can still do this with just a byte transfer, then
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@@ -253,7 +265,7 @@
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 		 */
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 		blk_sz = ((sz + func->cur_blksize - 1) /
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 			func->cur_blksize) * func->cur_blksize;
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-		blk_sz = mmc_align_data_size(func->card, blk_sz);
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+		blk_sz = _sdio_align_size(blk_sz);
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 		/*
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 		 * This value is only good if it is still just
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@@ -266,8 +278,7 @@
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 		 * We failed to do one request, but at least try to
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 		 * pad the remainder properly.
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 		 */
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-		byte_sz = mmc_align_data_size(func->card,
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-				sz % func->cur_blksize);
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+		byte_sz = _sdio_align_size(sz % func->cur_blksize);
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 		if (byte_sz <= sdio_max_byte_size(func)) {
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 			blk_sz = sz / func->cur_blksize;
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 			return blk_sz * func->cur_blksize + byte_sz;
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@@ -277,16 +288,14 @@
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 		 * We need multiple requests, so first check that the
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 		 * controller can handle the chunk size;
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 		 */
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-		chunk_sz = mmc_align_data_size(func->card,
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-				sdio_max_byte_size(func));
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+		chunk_sz = _sdio_align_size(sdio_max_byte_size(func));
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 		if (chunk_sz == sdio_max_byte_size(func)) {
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 			/*
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 			 * Fix up the size of the remainder (if any)
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 			 */
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 			byte_sz = orig_sz % chunk_sz;
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 			if (byte_sz) {
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-				byte_sz = mmc_align_data_size(func->card,
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-						byte_sz);
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+				byte_sz = _sdio_align_size(byte_sz);
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 			}
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 			return (orig_sz / chunk_sz) * chunk_sz + byte_sz;
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@@ -700,6 +709,7 @@
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 /**
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  *	sdio_set_host_pm_flags - set wanted host power management capabilities
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  *	@func: SDIO function attached to host
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+ *	@flags: Power Management flags to set
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  *
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  *	Set a capability bitmask corresponding to wanted host controller
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  *	power management features for the upcoming suspend state.