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Perez de Azpillaga" To: Andriy Shevchenko Cc: Andy Shevchenko , "Jose A . Perez de Azpillaga" , dri-devel@lists.freedesktop.org, Greg Kroah-Hartman , linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev Subject: Re: [PATCH v2] staging: fbtft: fb_ra8875: replace udelays with fsleep Date: Thu, 26 Feb 2026 09:31:49 +0100 Message-ID: <20260226083151.186260-1-azpijr@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi Andy, write_reg8_bus8() calls par->fbtftops.write(), which in this driver resolves to write_spi(), which calls spi_sync(). Since spi_sync() requires sleepable context, write_reg8_bus8() is transitively guaranteed to run in non-atomic context, making fsleep() safe to use. Best regards, Jose